add polynomials

How can you tell if 2 terms are alike?
ex: (6n²-4)+(-2n²+9)

n² #

6n² -4

+ -2² +9

=

4n² + 5

Which terms can be added?

• variables that can be added have same exponents and letters

What are the steps to adding a polynomial?

• divide into like terms
• pick out variables and constants
• add like terms